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dc.contributor.authorKeene, G.en
dc.contributor.authorSimpson, D.en
dc.contributor.authorKalairajah, Y.en
dc.identifier.citationJournal of Bone and Joint Surgery-British Volume, 2006; 88B(1):44-48en
dc.description.abstractTwenty patients underwent simultaneous bilateral medial unicompartmental knee arthroplasty. Pre-operative hip-knee-ankle alignment and valgus stress radiographs were used to plan the desired post-operative alignment of the limb in accordance with established principles for unicompartmental arthroplasty. In each patient the planned alignment was the same for both knees. Overall, the mean planned post-operative alignment was to 2.3° of varus (0° to 5°). The side and starting order of surgery were randomised, using conventional instrumentation for one knee and computer-assisted surgery for the opposite side. The mean variation between the pre-operative plan and the achieved correction in the navigated and the non-navigated limb was 0.9° (sd 1.1; 0° to 4°) and 2.8° (sd 1.4; 1° to 7°), respectively. Using the Wilcoxon signed rank test, we found the difference in variation statistically significant (p < 0.001). Assessment of lower limb alignment in the non-navigated group revealed that 12 (60%) were within ± 2° of the pre-operative plan, compared to 17 (87%) of the navigated cases. Computer-assisted surgery significantly improves the post-operative alignment of medial unicompartmental knee arthroplasty compared to conventional techniques in patients undergoing bilateral simultaneous arthroplasty. Improved alignment after arthroplasty is associated with better function and increased longevity.en
dc.publisherBritish Editorial Soc Bone Joint Surgeryen
dc.rights© 2006 British Editorial Society of Bone and Joint Surgeryen
dc.subjectAnkle Joint; Hip Joint; Knee Joint; Humans; Bone Malalignment; Osteoarthritis, Knee; Treatment Outcome; Preoperative Care; Surgery, Computer-Assisted; Arthroplasty, Replacement, Knee; Prospective Studies; Aged; Middle Aged; Female; Maleen
dc.titleLimb alignment in computer-assisted minimally-invasive unicompartmental knee replacementen
dc.typeJournal articleen
pubs.library.collectionCentre for Automotive Safety Research publicationsen
Appears in Collections:Centre for Automotive Safety Research publications

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